Method of raising the alloying qualification of titanium.



E-RUHR, GERMANY, ASSIGNORS I K K HANS GOLDSCHMIDT AND OTTO WEIL, 9F ESSEN-Otif- I TO THE'ZEIBM OI'F'TH'. GOLD SCHMIDT, OE ESSEN- N -THE-RUHRQWEBQNYg'WM- POSED 0F KARL GOLDSCHMIDT' AND HANS "GWLDSCHMIDT.

METHOD OEBAISING THE ALLOYING QUALIFICATION 0E TITANIUM.

1,075,782. i No Drawing.

To allwhom it may concern:

Be it known that we, Hans GOLDSCHMIDT and OT ro WEIL, subjects of the King of Prussiaf German Emperorfand residents of Essen-on-the-Ruhr, in the Province of the Rhine, German Empire, have "jointly in ventedcertain new and useful Improvements in-the Method of Raising the Alloying Qualification OfTitan'ium, of which the following is aspecification.

Numerous experiments have shown that it is possible by an addition of titanium to improve considerably the quality of steel and cast-iron. The addition of titanium in a metallic state has been attempted, but on account of the bad alloying qualification, the high melting point and the small specific weight of this metal, the results obtained from such attempts have been entirely unsatisfactory, and because of this experts have'been of opinion that in order to obtain good results it is necessary to make use, instead of pure titanium, of an iron-titanium alloy containing only from 10% to 15% of titanium. In many cases,

. however, it wouldhave been preferable, to

add an iron-titanium alloy containing a high percentage of titanium, but the same objections haveibeen raised to the use of such an alloy as to theemployment of metallic titanium, the objection in each case being to the use of a high percentage of titanium. As a result of our experiments we have found that an alloycontaining a higher percentage oftitaniufn'than has been employed heretofore may be used to advantage in baths of steel and cast-iron if aluminum is added as a third element so that a conjoint action of the titanium alloy and the aluminum takes place in the baths, in which case We, preferably, employ an iron-titamum-aluminum alloy. By using such an exampleas baths of steel or cast-iron, (by

fixing the nitrogen and de-oxidizing and Specification of Letters Patent. Application filed October 19, 1910. Serial No. 587,857.

removing the sulfur) is greatly facilitated.

The action takes place much more quickly than when analloy is used containing only from 10% to 15% of titanium. In practice it has been found advisable to use alloys' containing from 15% to 35% oftitanium and a quantity of aluminum amounting to abdut 10% of the titanium present, that IS to say, 1.5% to 3.5% of aluminum. The alloy Patented (lot. 14, 1913:

may, however, contain a greater percentage.

of aluminum. One of the principaladvantages resulting from the addition of the aluminum is that the melting point of the titanium alloy is lowered while the alloy ing qualification is considerably increased. Iron-tit nium aluminuig alloys suitable for the p rpose herein described and of any desired composition may be easily produced by the alumino-thermic process. These alloys also have the furthers-advantage of being free from carbon. An alloy from 24% to 25% of titanium and 3% of aluminum has proved to be very useful.

What We claim is: w l

1. The method of .treating a metallicbath, which consists in subjecting it to the conjoint action of aluminum and an alloy of titanium containingmore than 15% of titanium.

2. The method of treating a metallic bath, which consists in subjecting ,it to the conjoint action of a mall percentage of aluminum and an alloy of titanium con- 1 taining more than 15% of titanium. T.

3. The a method of treating metallic bath, whichconsists in subjecting it to the action of an alloy of titanium containing more than 15% of'titanium in combination with at least 1.5% of aluminum. I

A methodof treating a bath of iron or; steel, which consists in subjecting it to the action of an alloy of titaniumwith aluminum containing a greater percentage of titanium than aluminum.

5. A method of treating a bath of iron containing or steel, which consists in subjecting it to the actlon of an alloy of. ferro-titanium with aluminum containing a greatef' percentage of titanium\ than aluminum. 7

6. A method of treating'a bath of iron or steel, which consists in subjecting it to the action of an-alloy of iron, titaniumand aluminum containing from 24% to 25% of titanium and about 3% of aluminum.

In wigness whereof we have hereunto set our han s in the presence of two witnesses.

HANS G'OLDSCHMIDT. [1 s.]' OTTO WEIL. [L.,S.] In the presence of- CHAS. luVVRIGHT, ALFRED HENKEL. 

